What is the impact of delayed fontanel closure on a baby's growth and development?

Patient's question:

Symptoms: Delayed fontanel closure
Onset date: October 9
Laboratory test results: What negative impact does delayed fontanel closure have on the baby's growth and development? Is it necessary to undergo further tests?
Previous treatment history and effectiveness: Vitamin D3 - How is it digested?

Doctor's answer:

Newborns' soft spots should close before they are one to one and a half years old. Your child is already two years old, but their soft spot has not closed yet. This could indicate a severe calcium deficiency.
Children have limited diets, and they cannot benefit from the calcium in early breast milk, so calcium deficiency is a common issue. Delayed soft spot closure is one of the symptoms. If calcium absorption is timely and effective, it won't cause any problems for the child. However, if the child has a severe calcium deficiency, their bones will be softer in early life. When they bear significant weight, such as sitting for long periods or chest compression, it can lead to conditions like pigeon chest or bowlegs. Walking in an X or O shape is another symptom of a series of rickets-related issues.